共查询到20条相似文献，搜索用时 468 毫秒
1.
全天候多功能测量实验场的建设研究 总被引：2，自引：0，他引：2
测绘科学是一门实践性很强的学科，测量实验条件的好坏直接影响到教学质量，针对目前测量实验教学中存在的问题，论述了建立全天候多功能测量实验场的必要性，介绍了测量实验场建设的方法和内容，分析了测量实验场产生的初步效果。 相似文献
2.
提出了利用神经网络的零件在线测量的方法，该方法克服了常规接触式测量难以实现在线测量的缺点，利用对零件所拍摄的立体象对，对其进行必要的处理和分析后，提取其三维信息，从而计算出零件表面点的三维坐标．在处理过程中，充分利用神经网络的学习、记忆和并行处理的能力，以满足在线测量的连续、快速测量的要求，实际应用表明，本文所提出的方法完全能满足自动化生产中零件在线测量的要求，对具有复杂曲面的零件的测量尤其具有重要价值 相似文献
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对于粒状保温材料导热系数的测量，利用稳态球体法测量原理，设计了3套测量装置，并对3种测量结果进行了误差分析。实验结果表明：实验操作灵活多样，实验数据精确可靠，实验效果形象直观。满足了科研测试和教学实验的基本要求。 相似文献
4.
全球定位系统在工程测量中的应用 总被引：1，自引：0，他引：1
在洛阳市高层次人才居住区的道路设计的控制测量中采用了全球定位系统(GPS)测量技术，按照分层布网、两级控制的原则，对两级网点分别进行了GPS静态测量、动态测量，用大地测量法对其中部分网点进行了校验，对CPS的测量死角网点用大地测量法进行了测量。测量实践表明：GPS测量具有精度高、成本低、选点灵活、时间短的优点。 相似文献
5.
具有最少采样点的圆度误差测量研究 总被引：1，自引：0，他引：1
建立了采样点均匀分布情况下，圆度误差测量采样点数量与测量极限误差之间的定量关系数学模型。根据所得数学模型，对测量坐标值原则下给定圆度误差检测对象的采样点进行规划，求得具有最少采样点的测量方法，并给出了测量实例，对数学模型进行了验证。 相似文献
6.
文章介绍了经过改进的伺服阀气动配磨系统．整个系统集中于一个试验台上，采用流量测量和压力测量两种测量方法，并使二种方法有机地融合在一个系统中．原伺服阀气动配磨系统在测量台架，测量气路和测量软件方面被改进后，缩短了测量时间、提高了测量精度，能更好地满足工厂实际生产的需要． 相似文献
7.
GPS RTK测量数据质量分析与改进技术 总被引：1，自引：0，他引：1
GPS RTK数据质量的分析是RTK测量数据处理的重要步骤。通过两个RTK测量实例，讨论了RTK测量能够达到的测量精度与成果可靠性问题，对改进数据质量提出了相关措施，得出了RTK测量技术设计要求。 相似文献
8.
针对海岸地形测量中以航空摄影的应用需求，纵使海岸地形的特点，分析了海岸地形航空摄影测量的技术问题和相应的技术方法，提出了基于水位观测及潮汐分析的海岸航空摄影理论构架，最后指出海岸地形航空摄影测量是海洋测量与航空摄影测量新的结合点，并为海陆数据统一使用提供了可观前景。 相似文献
9.
朱兆青 《实验室研究与探索》2005,24(6):48-50
利用单片机技术测量了固体和气体介质的介电常数，给出了测量原理、实验测量方法以及测量电路原理图，并且在Windows2000环境下利用Delphi7．0可视化编程语言，实现了实验数据的上位机采集与处理过程，构成了智能化的实验测量系统。 相似文献
10.
工程测量和控制测量都了不开导线测量，由于种种原因，做闭合导线测量时，往往会出现假闭合现象。只有杜绝假闭合现象，才能使测量成果不可信可靠。 相似文献
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
13.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
14.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
18.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
19.
Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
20.
YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献